Crystallization manipulation and morphology evolution for highly efficient perovskite solar cell fabrication via hydration water induced intermediate phase formation under heat assisted spin-coating

被引：43

作者：

Zhou, Xianyong ^{[1
,2
]}

Zhang, Yong ^{[1
]}

Kong, Weiguang ^{[1
]}

Hu, Manman ^{[1
]}

Zhang, Luozheng ^{[1
]}

Liu, Chang ^{[1
]}

Li, Xiangnan ^{[1
]}

Pan, Chunyue ^{[2
]}

Yu, Guipeng ^{[2
]}

Cheng, Chun ^{[1
]}

Xu, Baomin ^{[1
]}

机构：

[1] Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China

[2] Cent South Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2018年 / 6卷 / 07期

基金：

中国国家自然科学基金;

关键词：

BASE ADDUCT; IODIDE; CH3NH3PBI3; DEPOSITION; LAYERS; ROUTE; FILMS;

D O I：

10.1039/c7ta08947c

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A delicate control of crystallization and morphology of perovskite absorbers is critical to obtain high performance hybrid perovskite solar cells (PSCs). Here, we have developed a novel crystallization strategy which involves hydration water induced intermediate phase formation under heat assisted spin-coating processing (HASP) to manipulate the morphology and grain size of perovskite films, and thus it can avoid the use of toxic and volatile antisolvents used in conventional one-step solution processes to make PSCs. During HASP, impressive morphological evolution of films occurs with the formation of CH3NH3PbI3 center dot xH(2)O perovskite intermediate phases. With ingenious control of the crystallization kinetics, highly crystalline perovskite films with fewer defect states and high carrier lifetimes are obtained. The corresponding PSCs exhibit a power conversion efficiency (PCE) of 19.12% with a stabilized power output efficiency of 18.89% at the maximum power point, which is a 70% enhancement compared to that of conventional one-step process based PSCs. Furthermore, the PSC fabricated by the HASP method achieved a PCE of 15.47% with an active area of 1.2 cm(2). Moreover, the flexible PSCs fabricated by the HASP method achieved a record efficiency of 14.87% with negligible hysteresis for PEDOT:PSS-based flexible inverted PSCs. Our work opens up a new avenue for morphology and crystallization control through hydration water induced intermediate phase formation under HASP, which paves the way toward further enhancing the device performance of perovskite solar cells.

引用

页码：3012 / 3021

页数：10